He tells “Entertainment Tonight,” “This has been a very difficult time for me battling this deadly disease, like millions of others in our country. I will remain in treatment for as long as necessary and I am getting the best care I can possibly get anywhere.

“I am working as hard as any human being to live a sober life. I am truly grateful to all of my friends and fans who have sent me thousands of letters and messages of support.”

On Tuesday, Cassidy was charged with one count of driving under the influence of alcohol following an arrest in Los Angeles on Jan. 10, when he failed a sobriety test and was reportedly found to have a blood alcohol level of more than twice the legal limit.

The January arrest marked the third time Cassidy had been booked for drink driving offenses.

In 2011, he pleaded no contest after he was arrested for driving while drunk in Florida, and last year, he failed a field sobriety test in New York, and was charged with a felony driving while intoxicated as a result of his previous arrest.